CU-CPT9a is an antagonist of toll-like receptor 8 (TLR8).1 It inhibits activation of NF-κB induced by the TLR8 agonist R-848 in TLR8-overexpressing HEK-Blue cells (IC50 = 0.5 nM). CU-CPT9a reverses R-848-induced increases in NF-κB p65, IRAK-4, and TRAF3 protein levels in HEK-Blue cells.
1.Zhang, S., Hu, Z., Tanji, H., et al.Small-molecule inhibition of TLR8 through stabilization of its resting stateNat. Chem. Biol.14(1)58-64(2018)